Public sharing not all taks show up ?

I'm facing a problem with the public sharing with a basic account.
When accessing the public link, I only see 17 tasks out of the 68 I have. Couldn't figure out why? Is there a limit of number of tasks or is there a filter ?

Nop, none of my folders are privat.
The funny thing is that if I switch to a specific folder (in the public link) then I find all my tasks (of the folder). It's only in the "view all tasks" link that I have this clipping effect. But the number of visible tasks is changing, if I add a new task then it will show up in the view all tasks.